I had Mirena inserted 6 weeks ago and just had it removed. My medical history includes TIAs (mini-strokes) and migraines. I had a migraine EVERY DAY while I had Mirena. I also experienced ZERO LIBIDO (so what was the point of birth control!?), weight gain and mood swings. I had Paragard inserted a few days ago and I am already slowly returning to normal. My point - if you have had problems with hormones in the past, not only estrogen, but also progesterone, you may want to stay away from Mirena. My OB/GYN argued with me the entire time that there is no way Mirena could cause these symptoms since progesterone is not released in the bloodstream - BULL!!! Women, listen to your body and trust your gut.